Ceramic Bearing Upgrade Kit for ZIPP WHEELS (77/177 hubs) disc brakes & NSW Disc
The Kit includes :
- 4 x 61903 bearings
- 2 x 61803 bearings
ceramic bearings for one front and one rear hub.
Bearing Material: Chrome Steel 52100
Ball Material: Ceramic SI3N4
Enclosure #: Two Seals
Enclosure Material: Rubber Seal
Lube: Kluber NBU12/300KP
China Ceramic Manufacturer bearings have a proven lifetime which is 3-5 times longer than standard wheel bearings, reducing the need for bearing maintenance.